§-Quick questions
NSWBiologyModule 5: Heredity
Quick questions on Meiosis and gamete formation explained: HSC Biology Module 5
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are separate your two variation mechanisms?Show answer
Markers explicitly penalise blurring crossing over (Prophase I, alleles within a chromosome) and independent assortment (Metaphase I, whole chromosomes between gametes). Name the stage for each.
What are use the numbers?Show answer
When a question gives a diploid number, show "mitosis maintains, meiosis halves, fertilisation restores" with the actual values. For variation questions, the / calculation earns a mark.
What is label diagrams correctly?Show answer
If asked to model meiosis, show homologous pairs (not single chromosomes), correct chromosome counts at each stage, and homologues separating at Anaphase I but sister chromatids separating at Anaphase II.
What are red kangaroo across generations?Show answer
Macropus rufus has 2n = 20. Ovaries make eggs at n = 10 and testes make sperm at n = 10; fertilisation restores the joey to 2n = 20. If meiosis failed to halve, the number would double every generation (20, 40, 80) until the chromosomes could no longer be packaged - which is why meiosis is non-negotiable for sexual reproduction.
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